A Simple PCB 2 4GHz Wifi Yagi

[@haggar11]

As usual Andy, hugely informative and top class educational lecture. Man, we have learnt a lot from you. Thanks a lot.

[@andrewmcneil]

Thanks Hassan

[@worryingkind10]

it is a balun but there's two things that’s critical. the material of the pcb (fr2,fr4) and the distance between the plates of copper. different material or different spaces creates different velocity factor, and that’s a critical point of the pcb baluns

[@davedave4865]

Great video One suggestion is that u could use none cooper clad board (FR4board) for the parasitic elements (centre board) And add copper tape as needed for the parasitic elements .

[@RC-Flight]

Great video! If you were to etch a 2.4 GHZ Yagi on a single side PCB and a 5.8GHZ Yagi on another single side board then put them back too back with 5 mm spacer, could you hook a single coax too both of those antennas? I’m looking too make an antenna too use on my RC airplane radio transmitter. the radio can be setup to work on 2.4 or 5.8.

[@Frankey2310]

Look, I'm not an expert on antennas, but a common rule of thumb for dipoles is to put at least halfwave between them, unless you specifically building an antenna array. This is true for both RX and TX. Halfwave at 2.45 GHz is a little over 60 mm, so, unless I had everything pre-calculated in MATLAB or, better yet, had all the stuff necessary to test a setup like this, I'd make that spacer 100 or 200 mm, just to be more or less sure the antennas won't interfere with each other. Even if 10 cm is somehow a portability issue for you, you can always assemble the setup on the spot.

[@hoggif]

If you want to feed a copper wire through a pcb and not drop out, you can use cutters that crimp the end. They are not that expensive either. Usually they leave something like 1.5mm of wire that is crushed flat from sides. They are handy for pcb assembly too. However, if you ever want to remove components, you need some extra force to deform wire enough to get a component out again.

[@andrewmcneil]

I will have a look thanks hoggif

[@hoggif]

@@andrewmcneil If you find any source that sells those pliers you have a huge variaty available. There are pliers that cut to lenght and bend the lead to 45 degreed, end cutters that crimp and many variations. Piergiacomi TS30D could be one that crimps (not 100% sure) as is manufactured. Those used to be more common when through hole was the thing in the industry. Much more rare now. I picked up a load of Erem pliers like that for a fiver when one shop dumped them. I have a life time supply of Erem pliers that cut from all angles and fixed lenghts, adjustables and lead forming ones.. Erem seems to make no more some of the types I have. I think I have also some cheap chinese version that cuts and crimps.

[@RCCarSimulator]

@@andrewmcneil You could use PCB terminal pins. www.ebay.co.uk/itm/PCB-Terminal-Pins-for-Vero-Boards-Stripboard-Lot-of-100/172228949934?hash=item2819a537ae:g:-8AAAOSw4xNevnrW

[@aurthorthing7403]

Cool and thanks for the pdf. I have a roll of copper tape that I've been wanting to use to build one of your other designs But now I think I will give one of these a try.

[@markspc1]

Excellent work again.

[@christianmock1815]

Andrew, i would like to help you with design of proffesionally made pcbs. Prototype pcbs from china are quite cheap. Let me know if i can help.

[@Belfor09]

Hi Andrew. TPlink WN722N claims that it has 20dBm of TX power under Windows 10. If I purchase something like AWUS036NH, will this produce better signal to my router? I know it has got 2000mW of power but it probably work under restricted 20dBm (100mW in my country is the limit). I really want to test that out but I don't really want to throw money on something that will not work. Can you give me your inside? Why are You using Alfa cards? What is the main reason? I've seen you use it under Windows 7. Why this, over much cheaper WN722N? Cheers, amazing channel.

[@MirceaVlad]

So, the driven element has a length of 23 or 24 mm? I'm asking because there's this difference between the pdf and the actual measurements in the video. Also, that distance between the "feet" of the "h" is it 16mm or 18mm?

[@acestudioscouk-Ace-G0ACE]

Another useful video, thanks! I noticed that the parasitic elements on the conductive spine antenna (less good SWR) were thicker than the others. At microwave wave lengths would that affect SWR?

[@rogermachin1046]

Many thanks, but unfortunate, the .pdf format is not the more easy to open in pcb editor ( as kicad)

[@onedayillpay]

can you make a 5.8 ghz print

[@aihysp]

Hello @anderw mcneil, what kind of antena will you use for house to house , line of site , 250 meters? i want to to try one of your antena

[@robson6285]

But why you have not all elements etched on one pcb? Why you make the two little boards? Even if you only want to use onesided pcb you could make it on two instead on three i think?

[@lubibubi6380]

How you etch that and can i buy this antenna with your describtion link?

[@SimonShaws]

On the continuous conducting parasitic, on commercial antennas these are usually electrically joined to the back reflector. Can you try this? Great videos.

[@andrewmcneil]

I have : kzbin.info/www/bejne/nJLSYn6BrNKjqZI

[@mihai1339]

Will you make a speedtest of this antenna in a future video?

[@irisp7858]

do you have a self-made (directional) antenna signal strength strength somewhere i can see (to compare what i could do myself) ?

[@luiscoelho6985]

Awesome! Can u do a LTE antenna for a Huawei 535?

[@droolian01]

Brilliant work again. I've got a couple of questions. Could you use copper tape ( I've got a roll of 5cm wide tape), you could then use a craft knife to cut shapes and stick to a non conducive board (like artboard). Assuming that you manage to get the gap between the balun part correct, would the dielectric constant of the different boards affect its performance? What gain do you expect from the 10 element Yagi? What about stacking them 😁

[@andrewmcneil]

10 element should be around 14db and yes you can use copper tape or aluminium. I have done this in older videos. Most plastics have a similar dielectric constant as fiberglass PCB

[@lorinrandall3508]

Great video I have learned so much from watching you. The question o have is if i encased some RG316 in clear tubing and I used it outside would there be any impedance?

[@andrewmcneil]

The clear plastic tubing would have no effect on the coax impedance. Glad you like and have learned from my videos. Its a great hobby

[@lorinrandall3508]

@@andrewmcneil thanks Andrew you really have taught me so much and everything I make I give you credit for. Keep the videos coming brother.

[@محمدبازيد-ن2ك]

Greetings and appreciation for your elegant and beautiful person

[@xsirfr1958]

I thought the balun was to reduce radiation from the coaxial feed, not to improve VSWR.

[@andrewmcneil]

Reduce reflections back down the coax to improve the VSWR

[@hectorsalas1670]

Cuantos dbi

[@andrassteger9589]

Hi Andrew, fist of all thank You very much posting such a very registering videos. I think the community inclusive me are learing a lot from you :-) I just over pondering on the following: As per this sketch (drive.google.com/file/d/1ABpQVXIWWiwi8oFFaEO1FPkJDI2PzTeZ/view) the total length of the driven element (dipole) is approx 2x24 = 48mm. (may be -3 mm) However the half of the wavelength of 2.4GHz is 62,5 mm. Please correct me if I'm wrong, but to get the best result the total length length of the dipole shall be 62.5 mm and not 48mm. May be this scenario was tested

[@kose2ik]

What diffrent is if this small triangle, after antenna and before connector marked red triangle in picture www.ti.com/lit/an/swra350/swra350.pdf and how cheap is to order PCB from China ? does not want to advertise, but I understand, it seems like it is cheaper to order and the only difference is that the ordered (high-quality) goods do not arrive until a week or a month later. There are at least four (actually more) of these companies, of which other electronics youtubers have also reviewed (quality vs. price vs. delivery time). And they have found that it is better to have a PCB made in China (even with an antenna prototype, if you can order a larger area for the PCB and then cut a smaller area during testing). Like this www.pcbway.com/project/share/Yagi_Uda_PCB_Antenna.html

[@irisp7858]

Why u not use PCB service: Elecrow / PCBWay / JLCPCB ? (u can make/order PCB's easy what is to u make itself TOO SMALL aso. ) And tray diffrent design ( what have too in Google Patent too ( I think 50% patetnt owners dont know what they are doing :) (no sence patents ( to me ) ) ) ). u can order diffrent designs and then test they difference. Yagy was not: active element 1/2 (2x 1/4), Ref. +5% , 1st director element -5%, 2nd=1st-5%, 3nd=2nd-5% aso.? (and 1st director-reflector: 0.325 lamda ( dir.-ant: 0.125 lam., ref.-ant.:0.2 lam)?)

[@1complex187]

Your antennas doesnt work. You cant build antenna without proper simulation, measuring signal reception Is only the 2% of the antenna. Also please make working antennas, so people dont waste time building something that doesnt work.

[@andrewmcneil]

Give me a break this is a known design why simulate it. Why don't you start your own youtube channel and show use all how its done

[@haggar11]

Look Mr. Insta, this is not a football go away.! what 2% rubbish you talking about without knowlege, whether you like or not, this channel has been one of the top youtube channel in educating people about antennas.

[@1complex187]

@@haggar11 continue Building antennas without simulation and not working.

[@haggar11]

Insta -1kledi what do you know about antenna simulation?!

[@tmpserg]

Most of Andrew's antennas really weird, high VSWR, etc But not this one This one work Very well Because it is not Andrew's design )))